Views:3 Author:Site Editor Publish Time: 2017-09-07 Origin:Site
the most important points to use piezoelectric ceramic transducer
the application of piezoelectric transducer is also reflected in its value in the daily life of. It is made by using piezoelectric ceramic characteristics and characteristics of the ultrasonic developed , because of easy installation, reliability,small firing angle ,waterproof type, high sensitivity, widely used in the robot collision, level monitoring, a variety of ultrasonic proximity switches, and burglar alarm and other related fields. It is commonly used for cars, lighters, gas stoves in the daily life .
About piezoelectric ceramic transducer ,tt is important to note that it must use a vertical thickness sensor vibration mode of piezoelectric ceramics in the high frequency detection. In this case, the matching of the acoustic impedance of the piezoelectric ceramic and air becomes more important. Because the acoustic impedance of the piezoelectric ceramic is 105 of the acoustic impedance of the air, this leads to a large loss on the vibrating surface of the piezoelectric ceramic, and it is necessary to adhere a special PZT material on the piezoelectric ceramic transducer , it can be achieved with the air impedance matching, so as to achieve the purpose of measurement.